# Triac STMicroelectronics EB168891121 600V 4A semiconductor switch (Triac)

**URL:** https://aio.lv/en/product--triac-stmicroelectronics-eb168891121-600v-4a-semiconductor-switch-triac--4223468
**Data updated:** 2026-02-12 14:06 (EET)
**Category:** Other Repair Parts
**Manufacturer code:** EB168891121#
**EAN:** 3100000869694
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 1.77 €
**Prices and availability valid until:** 2026-08-14 23:59
**Price without VAT (21%):** 1.46 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--triac-stmicroelectronics-eb168891121-600v-4a-semiconductor-switch-triac--4223468

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

Triac STMicroelectronics EB168891121 is a semiconductor AC switch rated for 600 V and 4 A. Designed for switching and control of AC loads, it suits applications such as motor speed control, light dimming, and solid-state relays. Compact and reliable, the device provides bidirectional conduction for AC circuits and is intended for integration in control and power electronics.

## Long description

Triac STMicroelectronics EB168891121 600V 4A semiconductor switch (Triac) is a bidirectional AC switch designed for integration in control and power electronic circuits. Rated for 600 volts and a nominal current of 4 amperes, this compact triac enables control of alternating-current loads by conducting in both directions when triggered. It is suitable for switching and phase-control applications where reliable conduction and compact footprint are required.
Advantages
The triac provides bidirectional conduction for AC circuits, enabling control of both halves of the waveform without requiring a bridge or additional polarity switching. Its 600 V voltage rating and 4 A current capacity make it suitable for a range of low- to medium-power mains applications. The compact package supports dense PCB layouts and integration into motor controllers, light dimmers, and solid-state relay designs.
Suitable for
Phase-angle control of AC motors and fan speed regulation
Light dimming and heater power regulation
Solid-state relay and AC switching modules
Small household appliance control and industrial control circuits
Key specifications
Maximum repetitive off-state voltage: 600 V
Nominal on-state current: 4 A
Bidirectional AC conduction (Triac operation)
Compact semiconductor package suitable for PCB mounting
Designed for phase-control switching and general AC load switching
How to use
Integrate the triac into the AC switching circuit following the manufacturer’s recommended layout and gate drive practice. Provide an appropriate gate-trigger network to ensure reliable firing at the intended phase angle; typical gate components include resistors, diodes, and optoisolators for isolation in control circuits. Observe proper heat dissipation measures and use a heatsink or thermal vias on the PCB if continuous currents approach the device rating.
Usage recommendations
Verify the expected load current, transient conditions and ambient temperature to ensure operation within the triac’s ratings. Use snubber networks or RC filters to limit dV/dt and prevent unintended triggering in inductive or noisy environments. For safety and EMC performance, follow isolation and grounding best practices and consult detailed datasheet parameters when designing the final circuit.

## FAQ

### How much does the Triac STMicroelectronics EB168891121 600V 4A cost, and is it available for purchase?

The price is 1.77 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 23.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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